Cattle guard



o. .BJC-:RK:

CATTLE GUARD July l', 1930,.v

Fiied May 1929 Trap/VEP' f Patented at 1.19a- 1,769,486

'y UNI. S PATENT FIiECEY OLOF 12303K, OF TAF'I,y BRITISH COLUMBIA,CANADA CATTLE GUARD yApplication led May 31, 1929. Serial No. 367,331.

This invention relates to improvements in shafts and separated by thecollars 9, orthe cattle guards of that type adapted to be placed spurwheels may be of the type shown in Fig. betweenv and alongside theyrails of a railway 4 comprising a plurality of spurs 10, 11, 12, 13 ackadjacent the railway crossings to preand 14 loose upon the hub 15 thatterminates vent or deter cattle from walking along the in the flanges16, 17 that cooperate to secure 55 railway right of way. @ne object isto prosaid yspurs together. The several spurs are vide a guard that ispositive in use, that is formedeach witha perforation 19, the severaldurable and that is so constructed that broken perforations of theseveral spurs Abeing or worn parts may be readily replaced when alignedto permit passage of the locking pin lo necessary. 18 that extendsthrough all of said spurs to 6o Vith the foregoing andV other objects inkeep them in operative position. In the event view the inventionconsists in the combination that one spur becomes'broken the pin 18 mayand arrangement of parts to be hereinafter be removed and a new spurinsertedin place fully described, pointed out in the claim and of thebroken one and the pin then replaced.

l5 illustrated in the accompanying drawing The stringere 1, 2 are spacedapart'at right 65 which forms a partof this application for angles tothe railway rails 20,21 adjacent the patent and in whichrailway crossingand should the animals at- Fig. 1 is a fragment-ary plan view of arailtempt to walk down the tracks from the crossway right of wayillustrating the application ing they step upon the spur wheels which ofthe cattle guard. n make their walking so difficult, laborious and 'ioFig. 2 is a cross sectional view through Fig. uncomfortable that theyleave the track. 1 enlarged. What is claimed is Fig. 3 is a verticalsectional view through Y VIn a cattle guard, a framework, shafts one ofthe spur wheels and frame. carried thereby, spur wheels arranged uponFig. 4 is a central sectional view through each of said shafts, eachspur wheel compris- 'L5 amodiiied form of spur wheel. ing a hub formedwith flanged terminals, Fig. 5 is a view of one of the spurs. spursloose upon said hub, each spur being Like reference characters denotelcorreformed witha perforation, and a locking pin sponding partsthroughout the several views.v connecting the apertured portions of the:lo The cattle guard comprises a plurality of spurs of said hub. se

parallel shafts supported by parallel string In testimony that I claimthe foregoing as ers, each shaft being provided with a plumy own Iliavehereto affixed my signature. rality of spur wheels, the spur whe-els ofone OLOF BJORK. shaft being staggered with relation to those of thenextA shaft, the spurs of each spurY wheel 85 being either of theintegral type or loose spurs mounted upon a hub, the ends of which areflanged to hold the spurs in place.

The reference numerals 1, 2 denote the 40 stringere each of which isprovided with a n 90 metal strip 3 secured thereto by fasteners 4, saidstrips comprising a plurality of bearings r5 in which are disposed theends of the ypar-l allel shafts 6 that connect the said stringere.

4:5 Loose upon each shaftare a pluralitv of spur t Y 95 wheels 7, thespur wheels of one shaft being staggered with relation to those of theneXt shaft. The 'spur wheels may be of the type shown in Fig. 3 in whichthe spurs 8V are intev gral, the several wheels being loose upon their100

